Lock and key.



PATENTED AUG. 20, 1907.

sis i i, 5522 W AGOSTINI LOOK AND KEY.

.APPLIOATIQN FILED JAN. 26. 1907.

THE NORRIS PETERS cn., WASHINGTON, n. c

WILLIAM AGOSTINI, OF FALL RIVER, MASSACHUSETTS.

LOCK AND KEY.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed January 26, 1907- Serial No. 354,204.

To all whom it may concern:

Be it known that I, WILLIAM Asos'rmr, a citizen of the United States,residing at Fall River, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inLocks and Keys, of which the following is a specification, referencebeing had therein to the accompanying drawing.

My invention relates to locks and keys.

The principal object is so to design the eye and slot, bolt and key,that to gain access to the bolt of the lock, the web and pin of the keymust bear one relation to each other, while after having gained saidaccess, the web must, to operate the bolt, bear another relation to thepin. Broadly speaking, I accomplish thisobject by providing a key with amovably mounted web, and means to move said web in relation to the pinof the key, so that when in one position the pin and web can passthrough the eye and slot of the look, but cannot operate the bolt, andwhen in the lock, the web can be moved into another position which wouldnot have permitted the passage of the key through the slot, but whichdoes permit the web to move the bolt.

Figure 1 is a side view of a key embodying one featm-e of my invention;Fig. 2 is a bottom view of the pin and web of same; Fig. 3 is alongitudinal section showing the movable web, and means for moving it;Fig. 4 shows the web moved into operative position; Fig. 5 is aperspective view showing the interior of a bolt case; a bolt and itstumbler; Fig. 6 is alike view of the lockplate, web lockplate, and keytherein; all detached from the bolt case for the sake of clearness; thekey being sustained in the eye and the slot of the plates. Fig. 7 is across section of the bolt case, web lockplate and lockplate, and showshow the web of the key is held in operative position after the key hasbeen turned in the lock; Fig. 8 shows the relative positions of the keyand the bolt, when the key just contacts the bolt case, and the web isin normal position; Fig. 9 shows the web of the key moved into operativeposition; and Fig. 10 shows the web in engagement with the bolt, and ashaving moved the same into locking position.

In the drawings is shown a key 1, embodying one feature of my invention.Its stem 2, Figs. 1, 2, 3, 4, has a longitudinal opening 3 in the pinportion 4 thereof; and movably mounted therein is a rod 5; the free endof which projects from the opening by reason of a spiral spring 6,abutting the inner end of the rod, and the innor end of the opening. Thepin portion 4 has two cars 7, between which is a web 8, pivoted on a pin9; and a link 10, Fig. 3, connects the rod 5 and the web 8, so that amovement of the rod, causes amovement of the web. A bolt case 11, Fig.5, has movably mounted therein a bolt 12. One or more notches 13, 13",are cut in the bolt 12, to be engaged by the web 8 of the key,

for the purpose of moving the bolt. A tumbler 14 mounted upon a pin 15,has one spring end 16, in engagement with the case 11; another springportion 17 is adapted to snap into engagement with one or more notches18, 18, 18 in the bolt, for the purpose of locking the bolt in position;while still another portion 19 of the tumbler 14, lies parallel with andadjacent to notched portion 13 of the bolt. In the back of the bolt caseis a depression 20, which is the axis of the eye 22 of the keyhole inkey plate 21, Fig. 6, and which is for the reception of the projectingend of the rod 5 in the key. This plate 21 is secured to the back of thebolt case 11, by means of supporting members 23, shown in Figs. 6 and 7.A second plate 24, which for convenience may be called a web lockingplate, is at right angles to the axis of the key, Fig. 6, and at such adistance from the back plate 11 of the bolt case, as will, when the keyis in operative position and turned, see Figs. 7, 9 and 10,

permit the side of the web 8 of the key to engage the plate 23, Fig. 7,and thus be prevented by the latter,

from closing and assuming normal position, until the web and the slot inthe plate coincide. The eye 22 and the slot 25 in the key plate 21correspond in size with a cross section of the stem 2 and the closed web8 of the key;

while the eye 25 and slot 26 of the web locking plate 24,

are of such size as will permit the key and its web, when closed, topass through the same, as is shown in Fig. 6,

and, also to be opened, to assume position shown in Fig. 9. If desiredthe size of the slot 26, and the eye 25, may be such that the key cannotbe turned unless the web has been completely opened.

The operation of my invention is as follows: The key in its normalposition, Fig. 1, is inserted into the lock through the eye 22 and slot25 in the key plate 21, Fig. 6, until the free end portion 5 of the rodin the pin portion 4 of the key, contacts the depression 20, Fig. 5, inthe back of the bolt case 11, and the relations of the key, web, keyplate and web lock plate are, as shown in Fig. 6. A person notunderstanding the use of the key, cannot move the bolt; first, becausethe side of the eye 25 and slot 26 in the web lock plate 24, contact theclosed web 8; and further, should there be no web lock plate used, thekey would be of no use; for as long as the web 8 remains closed, as inFig. 8, the key can be rotated forever, without moving the bolt, for 100the web being closed, cannot engage the notches in the bolt. If however,the rod 5 of key is pushed hard against the back 11 of the bolt case,see Fig. 9, and the tension of spring 6 in the key, is overcome, thenthe inward movement of the rod 5 moves the link 10, and 105 the web 8assumes the position shown in Fig. 9; the inner edge of the web beinginside of the web lock plate 24. Now, by turning the key while the webis open, the web engages the web lock plate 24, Fig. 7,

and hence by means of the bolt plate 11 and the lock web 1 1 0 plate,the web is held in operative position. As the web moves up and around,Figs. 9 and 10, it engages a portion 19 of the tumbler, overcomes thespring 16, lifts the catch 17 from the notch 18 of the bolt and unlocksthe latter, engages a side of the notch 13, and moves the bolt, as shownin Fig. 10; and as it disengages the notch, the catch 17 of the tumblerengages the second notch as 18 in the bolt, and locks the bolt. When thekey has completed its revolution, and its web registers into the eye 25and slot 26 in the web lock plate 24, the spring 6, Fig. 3, in the key,being unopposed, snaps the web 8 back into normal position, and the keyassumes the position shown in Fig. 6. To make the lock doubly secure,the key may be inserted and turned once again in the manner described.This time it engages the tumbler 19, unlocks the bolt, and moves againstthe sides of a second notch 13; a bolt is again moved, and locked by thetumbler catching in a third slot 18 in the bolt; and the key, uponreturning to registering position, again assumes the position shown inFig. 6.

It is plain that the web locking plate may be dispensed with, and theweb of the key held in operative position by a constant pressure on thekey to hold the web open. While means might be embodied in the key tohold the web open, such means render the parts of the key numerous andcomplicated. The web lock plate seems to be the simplest solution to theproblem. However, I do not intend by the above explanation, to beunderstood as limiting myself to only a web locking plate.

In conclusion, by means of my invention, I provide a lock that cannot beunlocked by a solid key which may be passed through the eye and slot ofthe plate. For the sake of convenience, I provide a lever 30, and cam31, shown in dotted lines, by which the bolt may be unlocked from thatside of the lock opposite to the key plate, but this feature togetherwith the hand bolt shown, constitute no part of my invention. If desiredwards as 34, and pins as 35, may be provided for web 8 of the key, asshown, for example in Fig. 7.

What I claim is:

1. A key having a web pivotally secured to the shank of the key; aplunger in the free end of the key; a link connecting the plunger andthe web, all designed so that when the plunger is pressed against abody, as the side of a lock case, it will fully open the web and therelation between the open web and engaged end of the plunger will besuch that the web will be in the exact position required for it to beturned and moved into engagement with the bolt for which it is designed.

2. A lock having a back plate, a web lock plate, a bolt, and a key slot;a key having a web pivotally secured to the shank of the key; a plungermounted in the free end of the key, and to be pushed into engagementwith the back plate of the lock; a link connecting the plunger and theweb; the length and movement of the plunger, the position of the weblock plate, and of the bolt, being such that when the plunger is pressedagainst the back plate, to its full extent, the web is wide open and canbe turned, free of the web lock to engage the bolt.

In testimony whereof I aflix my signature in presence of two witnesses.

IVILLIAM AGOSTINI.

Witnesses RICHARD P. BORDEN, JENNIE ALCOCK.

